让mahout0.7在hadoop2.0环境下运行

由于官方打的jar包是用1.0环境下的，所以要想在2.0下运行，必须重新打包，重新打包前修改几个pom文件就可以，现已经测试通过：

1、根pom文件修改如下：

<hadoop.version>2.5.0</hadoop.version>
<!-- 将原来的1.0改为2.0版本-->
<!-- 并注释掉hadoop1.0的依赖-->
<!--dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
<version>${hadoop.version}</version>
<exclusions>
<exclusion>
<groupId>net.sf.kosmosfs</groupId>
<artifactId>kfs</artifactId>
</exclusion>
<exclusion>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty</artifactId>
</exclusion>
<exclusion>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-util</artifactId>
</exclusion>
<exclusion>
<groupId>hsqldb</groupId>
<artifactId>hsqldb</artifactId>
</exclusion>
<exclusion>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</exclusion>
<exclusion>
<groupId>oro</groupId>
<artifactId>oro</artifactId>
</exclusion>
<exclusion>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jsp-2.1</artifactId>
</exclusion>
<exclusion>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jsp-api-2.1</artifactId>
</exclusion>
<exclusion>
<groupId>org.mortbay.jetty</groupId>
<artifactId>servlet-api-2.5</artifactId>
</exclusion>
<exclusion>
<groupId>tomcat</groupId>
<artifactId>jasper-runtime</artifactId>
</exclusion>
<exclusion>
<groupId>tomcat</groupId>
<artifactId>jasper-compiler</artifactId>
</exclusion>
<exclusion>
<groupId>xmlenc</groupId>
<artifactId>xmlenc</artifactId>
</exclusion>
<exclusion>
<groupId>net.java.dev.jets3t</groupId>
<artifactId>jets3t</artifactId>
</exclusion>
<exclusion>
<groupId>org.eclipse.jdt</groupId>
<artifactId>core</artifactId>
</exclusion>
</exclusions>
</dependency-->

2、在mahout-core、mahout-examples、mahout-integration工程的pom文件中增加如下代码

<profiles>
<profile>
<id>hadoop1</id>
<!--activation>
<property>
<name>!hadoop.version</name>
</property>
</activation-->
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-core</artifactId>
<version>1.0.0</version>
<scope>compile</scope>
<exclusions>
<exclusion>
<groupId>net.sf.kosmosfs</groupId>
<artifactId>kfs</artifactId>
</exclusion>
<exclusion>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty</artifactId>
</exclusion>
<exclusion>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-util</artifactId>
</exclusion>
<exclusion>
<groupId>hsqldb</groupId>
<artifactId>hsqldb</artifactId>
</exclusion>
<exclusion>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
</exclusion>
<exclusion>
<groupId>oro</groupId>
<artifactId>oro</artifactId>
</exclusion>
<exclusion>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jsp-2.1</artifactId>
</exclusion>
<exclusion>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jsp-api-2.1</artifactId>
</exclusion>
<exclusion>
<groupId>org.mortbay.jetty</groupId>
<artifactId>servlet-api-2.5</artifactId>
</exclusion>
<exclusion>
<groupId>tomcat</groupId>
<artifactId>jasper-runtime</artifactId>
</exclusion>
<exclusion>
<groupId>tomcat</groupId>
<artifactId>jasper-compiler</artifactId>
</exclusion>
<exclusion>
<groupId>xmlenc</groupId>
<artifactId>xmlenc</artifactId>
</exclusion>
<exclusion>
<groupId>net.java.dev.jets3t</groupId>
<artifactId>jets3t</artifactId>
</exclusion>
<exclusion>
<groupId>org.eclipse.jdt</groupId>
<artifactId>core</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
</profile>
<profile>
<id>hadoop2</id>
<activation>
<property>
<name>hadoop.version</name>
</property>
</activation>
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-mapreduce-client-common</artifactId>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-mapreduce-client-core</artifactId>
</dependency>
</dependencies>
</profile>
</profiles>

3、在根目录下执行 mvn package -Phadoop2 -DskipTests 重新生成jar包